Using the exact series solution for diffraction by a perfectly conducting wedge, numerical results are presented for the structure of the field in the apex region. This provides insight to the nature of electomagnetic fields near a surface discontinuity. Topic: Radio waves.
There has been some interest shown recently in the practical significance of the antipodal focussing in VLF propagation. If the earth and the ionosphere were perfectly concentric spherical surfaces, theory indicates that the amplitude of the field should Topic: Radio waves.
Geographic and frequency dependent distributions of atmospheric noise *power enumerated in CCIR Report 322 (1964) are approximated by series expansions for use in electronic computers.Coefficients of Fourier series representation of worldwide geographic d Topic: Radio noise.
A common test procedure for measuring ferrimagnetic resonance linewidth, Delta H, and gyromagnetic ratio, gamma, of microwave ferrites is based upon a perturbation analysis of the complex frequency shift obtained when a small sample is placed in a resonan Topic: Radio--Tables.
A simple technique is described for extrapolating the 1 kc values of certain two-terminal capacitors to higher frequencies without incurring serious losses in accuracy.The method is intended for use with air capacitors having binding post or banana plug t Topics: Shortwave radio., Radio measurements., Calibration.
byBean, B. R. (Bradford R.), 1927-; Horn, J.D.; Riggs, L.P.
A survey of some of the advances in the field of synoptic radio meteorology is presented.The development of representative refractive index profiles for major air mass types is reviewed. Included is a description of several refractive index parameters cur Topics: Radio meteorology., Synoptic meteorology.
The supplement was written for the purpose of extending the scope of the original paper, by providing a more complete set of system-performance design equations, which apply to the Frequency Di * vision Multiplex--Frequency Modulation type of multichannel Topic: Radio--Receivers and reception.
The volume is a collection of diagrams, tables, and text material, which has been assembled to show the interrelationships between various radio frequency measurements made by the Institute for Basic Standards (IBS).In particular, the measurements are tho Topic: Radio frequency--Measurement.
A method is outlined for determining the relationships between the grade of performance, or message error rate, of a radio communication system and the system parameters. Results are presented in the form of design equations and system-design curves. The Topic: Radio--Receivers and reception.